sysutils/dsbdriverd: Update to 0.2

While here, add LICENSE_FILE

Release notes:

The following mentionable changes have been made:

• An -u options has been added. If defined, dsbdriverd starts dhclient(8) on Ethernet devices that appeared after loading the corresponding driver.
• An -l option has been added. It lists installed devices and their corresponding driver.
• Entries for if_qlnxe(4), if_bnxt(4), mpr(4), mrsas(4), and pms(4) have been added to the driver database.
• Reconnect if the connection to devd(8) was lost.
• The manual page now uses the mdoc(7) format.

PR: 221258
Submitted by: Marcel Kaiser <mk@nic-nac-project.org> (maintainer)